Vaporizer



June 29, 1954 w, w, RAY 2,682,454

VAPORIZER Filed Jan. 17, 1951 2 Sheets-Sheet l IN VEN TOR. W/LFRED M. RAY

Mad,

June 29, 1954 w. w. RAY 2,682,454 VAPORIZER Filed Jan. 1'7, 1951 2 Sheets-Sheet 2 INVEN TOR.

W/LFRED W. RAY

Patented June 29, 1954 UNITED s'rA'rss rarsu'r OFFICE VAPORIZER Wilfred W. Bay, New Philadelphia, Ohio Application January 1'7, 1951, Serial No. 206,405

15 Claims. 1

The invention relates in general to a mechanical device for mixing a plurality of fluids and more particularly to a rotatable device for vaporizing a raw liquid fuel in the presence of air.

An object of the invention is to provide a vaporizer for vaporizing liquid fuel in the presence of air to be used with an internal combustion engine utilizing the vaporized mixture.

Another object of the invention is to provide a vaporizer wherein centrifugal fans are enclosed in a housing and recirculating means is provided from an outlet of the fan to an inlet thereof.

A still further object of the invention is to provide a vaporizer having a plurality of centrifugal fans with a plurality of recirculating passageways for the fluid mixture so that the fluid stream has a plurality of possibilities of recirculation.

Still another object of the invention is to provide a vaporizer for use with internal combustion engines wherein a Venturi structure is utillzed to create a difierential air pressure and a recirculating passageway is terminated near the throat of the Venturi to utilize the differential air pressure in accomplishing a recirculation of the fiuid mixture.

Still another object of the invention is to provide a vaporizer for vaporizing a liquid fuel in the presence of air wherein the vaporizer has two fan compartments and a mixing compartment with each compartment having at least one recirculating passageway to a preceding compartment and wherein a check valve is provided in the last compartment so that the fluid mixture may only exit from the last compartment.

Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings, in which:

Figure 1 is a sectional View taken through the axis of the vaporizer;

Figure 2 is a sectional View line 2-2 of Figure 1;

Figure 3 is a sectional view line 3-3 of Figure 1;

Figure 4 is a sectional View line 4- of Figure 1;

Figure 5 is a sectional view line 5--5 of Figure 1;

Figure 6 is an end view looking at the right end of Figure 1;

Figure 7 is an elevational view of the left end of Figure 1; and,

Figure 8 is a sectional view taken along the line 3-4. or Figure 1.

taken along the taken along the taken along the taken along the that 2Q has a plurality of small holes 3%.

The vaporizer is best shown in the sectional view of Figure l, and includes a cylindrical shell ll having a front wall I? and a rear wall l3. An inlet housing It is provided in the front wall l2 and this inlet housing It carries a first bearing The inlet housing It has a flange fastened to the front Wall'l2 by bolts H.

The interior of the cylindrical shell I l contains first, second, and third transverse walls it, it, and which divide the interior of the vaporizer into first, second, third, and fourth compartments 2!, 22, 23, and 24. The third wall it carries a second bearing and the two bearings l5 and 25 journal a shaft 26 which is aligned along the axis of the cylindrical shell I l. A pulley 2'! is fastened to the shaft 28 to rotate therewith. The pulley 27 is to provide connection to an external power source to rotate this shaft 26.

The first compartment 2! contains an inlet conduit 28 which joins the flange it with the central portion of the second compartment 22. A

perforated conduit 29 is coaxial with and sur-' rounds the inlet conduit 28. The perforated con- A keyhole conduit 3| has a cylindrical portion 32 coaxial with and surrounding the perforated conduit 29 and has a keyhole portion 33 extending from the cylindrical portion 32 to the cylindrical shell H. The first wall It has a central aperture 34 which joins with the perforated conduit 29. A front wall 35 closes the forward ends of the perforated and keyhole conduits 29 and M. It will thus be seen that the space between the keyhole conduit SI and the perforated conduit 29 is only in fluid communication with the central portion of the second compartment 22 through the holes 30.

The second compartment 22 contains a first centrifugal fan 39 which has a disc-shaped wall 48 and a plurality of blades 4|. The disc-shaped wall All! has a plurality of holes 32 which are spaced close to the shaft 26. A central aperture 43 is provided in the second transverse wall I9 and this aperture 43 is of a larger diameter than the circle on which the holes 42 are placed. The holes 42 and the aperture 43 therefore constitute the main outlet of the second compartment 22.

A first spiral wall 44 is provided in the second compartment 22 and this spiral wall extends about 200 from a point on the inner periphery of the shell II to a point on the inboard side of a first reentrant scoop 45. A scoop aperture 36 is provided in the first wall it so that the scoop 45 may divert some of the heavier mixture into the keyhole conduit 3!. The reentrant scoop 45 and keyhole conduit 3| therefore constitute a first recirculating means for recirculating some of the heavier mixture from an outlet of the second compartment 22 to an inlet thereof.

The inlet to the third compartment 23 is at the aperture 43 as previously stated. The third compartment 23 contains a second centrifugal fan 48 similar to the first centrifugal fan 39 except that no centrally disposed holes are provided therein. The second fan 48 is also fastened to the shaft 26. The third compartment 23 includes a second reentrant scoop 49 and this scoop 49 extends through a scoop aperture 50 in the second wall 19 and extends over to the keyhole conduit 3|. The second scoop 49 is downstream of the scoop 45 in the second compartment 22 so that it will not interfere with the air flow within the second compartment 22. A second spiral wall is provided in the third compartment 23 and this spiral wall 5| extends about 200 from the inboard side of the second scoop 49 to a point 52 near but spaced from the inner periphery of the shell l I. The spiral Wall 5| has a plurality of tabs 53 bent inwardly into the air stream on the inboard side of the spiral wall 5| to act as scoops which divert some of the heavier mixture to a converging channel 54 which is formed by the narrow space between the shell I l and the spiral wall 5|. A small hole 55 is provided in the second scoop 49 to provide a small air flow into the pocket 56 immediately downstream of the scoop 49. An exit scoop 51 is provided on the inboard side of the spiral wall 5| and this exit scoop 57 is in communication with an aperture 58 in the third wall 29.

The fourth compartment 24 contains a curved channel 59. The curved channel 59 has a first end 65 and a second end 6|. The first end 60 is in communication with the exit scoop 51 through the aperture 58 and the second end 51 is at the underside of the vaporizer near the shell H. The second end 6| therefore exhausts the mixture into the fourth compartment 24. A reentrant tube 64 has an inlet and an outlet 65 and 55, respectively. The inlet 65 is positioned near the outlet or second end SI of the curved channel 59. The tube 64 extends through the third wall 20 and the outlet 66 of this tube 64 ends near the throat 61 of a Venturi structure 68 within the third compartment. The Venturi structure 58 is positioned in the air stream caused by the second fan 48 and is placed generally opposite the spiral wall 5!. The reentrant tube 64 and Venturi structure 68 provide a third recirculating means which extends from the fourth compartment 24 back into the third compartment 23 and will provide recirculation for some of the heavier or not completely vaporized mixture.

The fourth compartment 24 contains an outlet housing 19 which has a cylindrical outer portion H and a rectangular inner portion 12. The inner portion 12 carries a check valve 13 which permits only unidirectional flow of fluid out of the entire vaporizer.

Operation The vaporizer may be efficiently used for completely vaporizing a vaporizable liquid such as a liquid fuel when in the presence of sufiicient air. Both of these fluids or vapors will be drawn into the inlet housing M from some suitable source such as a carburetor of an internal combustion engine. The shaft 26 is adapted to be rotated preferably at high speed from some external power source, not shown. The rotation of the shaft 25 Will of course rotate the fans 39 and 48. The incoming fluids enter the central portion of the second compartment 22 by way of the inlet conduit 28. The centrifugal fan 39 tends to throw the mixture outwardly to the periphery of the shell H, and the heavier or unvaporized mixture will tend to be forced through the first reentrant scoop 45 and will recirculate through the keyhole conduit 3! and the holes 30 to the central portion of the second compartment 22. The only outlet from the second compartment 22 is at the holes 42 and aperture 43. Since this outlet is at the central portion of this second compartment 22 it will be only the lighter mixture or more nearly vaporized mixture that is forced out of this outlet. In the third compartment 23 a similar vaporizing process is utilized. The second fan 43 again attempts to force the fluid mixture or air stream to the periphery of this compartment. The heavier mixture will again go farthest to the outside, and hence will tend to go into the second reentrant scoop 49. This scoop will direct the air stream therein into the keyhole conduit 31 as another recirculating means. The lighter mixture will stay on the inside of the spiral wall 5| and will go out the exit scoop 51 as the direct exit of this compartment 23. Mixtures which are somewhat heavier will be deflected by the tabs 53 into the converging channel 54 and then will reenter the main air stream down-stream of the point 52 to be still further agitated by the centrifugal fan 48. The hole 55 is provided in the second scoop 49 in order to provide a small air stream into the pocket 56. This will assure that none of the vaporized fuel is permitted to condense in this pocket. The main air stream will pass through the Venturi structure 69 and thus at the throat 6! thereof a low pressure area will be developed.

The lighter or vaporized mixture passing out the exit scoop 51 will thus enter the fourth compartment 24 through the curved channel 59. The second end 6| of this channel directs the air stream toward the shell H and hence the air stream will eddy and further mix as it emerges from this channel 59. The inlet of the reentrant tube 54 is provided near the outlet of the curved channel 59 so that the heavier mixture emerging from this channel 59 will be recirculated into the third compartment 23 by means of the Venturi G8. The fans 39 and 48 will create an air pressure inside the fourth compartment 24 which will cause the air stream to lift the check valve 13 and to pass out of the outlet housing '10. The outlet housing [9 may be connected to any suitable device such as a burner for burning the mixed air and fuel or it may be connected to an intake manifold of an internal combustion engine. The many possibilities for recirculation of the mixture assures that the air and fuel are completely mixed and that the liquid fuel is completely vaporized. This latter result is achieved because it is primarily the heavier mixtures or the less thoroughly vaporized portions of the mixture that are recirculated.

What is claimed is:

l. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said fan compartment, a first outlet from said fan compartment, a second fan compartment having a second outlet and an inlet communicating with said first outlet, recirculating means separate from said second outlet providing communication from said second Ian compartment to said fluid inlet of said first fan compartment, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said second outlet and having a third outlet which is the outlet of said housing, a venturi in said second fan compartment, and a second inlet in said second fan compartment at said venturi communicating with said mixing compartment as a recirculating means.

2. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said fan compartment, a first outlet from said fan compartment, a second fan compartment having a second outlet and an inlet communicating with said first outlet, recirculating means separate from said second outlet providing communication from said second fan compartment to said fluid inlet of said first fan compartment, a mixing compartment in said hous ing, said mixing compartment having an inlet communicating with said second outlet and having a third outlet which is the outlet of said housing, recirculating passageway means from an outlet of one of said compartments into a preceding compartment and including a Venturi structure.

3. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said fan compartment, a first outlet from said fan compartment, a second fan compartment having a second outlet and an inlet communicating with said first outlet, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said second outlet and having third and fourth outlets, a venturi in said second fan compartment, a second inlet in said second fan compartment at the throat of said venturi communicating with said third outletas a recirculating means, said fourth outlet being the outlet of said housing, and a check valve in said fourth outlet.

4. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said fan compartment, a first outlet from said fan compartment, a second fan compartment having second and third outlets and an inlet communicating with said first outlet, a recirculating passageway separate from said third outlet and extending from said second outlet to the inlet of one of said fan compartments, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said third outlet and having a fourth outlet, said fourth outlet being the outlet of said housing, and a check valve in said fourth outlet.

5. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within saidhousing, means for defining a fluid inlet to said fan compartment, first and second outlets from said fan compartment, a recirculating passageway separate from said second outlet and extendin from said first outlet to said inlet, a second fan compartment having a third outlet and an inlet communicating with said second outlet, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said third outlet and having a fourth outlet, said fourth outlet being the outlet of said housing, and a check valve in said fourth outlet.

6. A vaporizer for mixing a plurality of fluids,

comprising a hollow housing, a first fan compartment within said housing, means for defining a fiuid inlet to said fan compartment, a first outlet from said fan compartment, a second fan compartment having second and third outlets and an inlet communicating with said first outlet, a passageway from said second outlet to the inlet of said fan compartments providing first recirculating means, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said third outlet and having fourth and fifth outlets, a venturi in said second ian compartment, a second inlet in said second fan compartment at the throat of said venturi communicating with said fourth outlot as a second recirculating means, said fifth outlet being the outlet of said housing, and a check valve in said fifth outlet.

'7. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said ian compartment, first and second outlets from said fan compartment, a passageway from said first outlet to said inlet providing first recirculating means, a second fan compartment having a third outlet and an inlet communicating with said second outlet, 2, mixing compartment in said housing, said mixing compartment having an inlet communicating with said third outlet and having fourth and fifth outlets, a venturi in said second fan compartment, a second inlet in said second fan compartment at the throat of said venturi communicating with said fourth outlet as a second recirculating means, said fifth outlet being the outlet of said housing, and a check valve in said fifth outlet.

8. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housing, means for defining a fluid inlet to said first fan compartment, first and second outlets from said first fan compartment, a passageway from said first outlet to said inlet providing first recirculating means, a second fan compartment having third and. fourth outlets and an inlet communicating with said second outlet, a second passageway from said third outlet to the inlet of one of said fan compartments providing second recirculating means, a mixing compartment in said housing having an inlet communicating with said fourth outlet and having a fifth outlet, said fifth outlet being the outlet of said housing, and a check valve in said fifth outlet.

9. A vaporizer for mixing a plurality of fluids, comprising a hollow housing, a first fan compartment within said housin means for defining a fiuid inlet to said fan compartment, first a passageway from said first outlet to said inlet providing first recirculating means, a second fan compartment having third and fourth outlets and an inlet communicating with said second outlet, a second passageway from said third outlet to the inlet of said first fan compartment providing second recirculating means, a mixing compartment in said housing, said mixing compartment having an inlet communicating with said fourth outlet and having fifth and sixth outlets, a venturi in said second fan compartment, a second inlet in said second fan compartment at the throat of said venturi communicating with said fifth outlet as a third recirculating means, said sixth outlet being the outlet of said housing, and a check valve in said sixth outlet.

10. A mechanism for mixing a plurality of fluids comprising a shell forming a hollow body, a revoluble shaft journalled in said body and adapted to be externally driven, a transverse wall in said body establishing first and second spaced compartments inside said body, an inlet for said fluids into the central portion of said first compartment, a centrifugal fan in said first compartment fastened to said shaft, a recirculating means from the periphery of said first compartment to the central portion of said first compartment, said fan having a centrally disposed aperture as a passageway to said second compartment, said first wall having an aperture disposed opposite the aperture in said fan, a second centrifugal fan in said second compartment fastened to said shaft, second recirculating means from the periphery of said second compartment to the central portion of one of said compartments, a Venturi structure in said second compartment in the fiuid stream, an outlet from said second compartment, a reentrant conduit having the entrance end thereof disposed in said second compartment outlet and having the exit end thereof disposed near the throat of said venturi, and an outlet from said body shell communicating with said second compartment outlet.

11. A vaporizer for mixing a plurality of fluids comprising a shell forming a hollow body having an axis, a revoluble shaft axially journalled in said body and adapted to be externally driven, an inlet for the gaseous mixture disposed at a first end of said body, an outlet from said body for the mixed fiuids at the opposite end of said body, a transverse wall in said body establishing first and second axially spaced compartments inside said body extending from the first to the second end thereof in that order, said body inlet communicating with the central portion of said first compartment, a reentrant scoop at the periphery of said first compartment, recirculating means extending from said reentrant scoop to said central portion of said first compartment, a centrifugal fan in said first compartment fastened to said shaft, said fan having a transverse wall adjacent said first wall, said transverse wall having a plurality of holes extending therethrough as a passageway to said second compartment, said first wall having a central aperture disposed opposite the plurality of holes in said fan, a second centrifugal fan in said second compartment fastened to said shaft, a second reentrant scoop at the periphery of said second compartment, second recirculating means extending from the second scoop to the central portion of one of said compartments, a spiral wall in said second compartment extending from the inboard side of said second scoop to a point near said body shell, a Venturi structure in said second compartment in the fluid stream, an exit scoop in said second compartment inboard of said second spiral wall, a channel having first and second ends, said first end being in communication with said exit scoop, a reentrant conduit having the entrance end thereof disposed near the second end of said channel and having the exit end thereof disposed near the throat of said venturi, and a passageway extending from the second end of said channel to said body outlet.

12. A vaporizer for mixing a plurality of fluids comprising a shell forming a hollow body having an axis, a revoluble shaft axially journalled in said body and adapted to be externally driven,

an inlet for the gaseous mixture disposed at a first end of said body, an outlet from said body for the mixed fluids at the opposite end of said body, first and second transverse walls in said body establishing first, second, and third axially spaced compartments inside said body extending from the first to the second end thereof in that order, an inlet conduit connecting said inlet with the central portion of said first compartment, a reentrant scoop at the periphery of said first compartment, recirculating passageway means extending from said reentrant scoop to said inlet conduit, a centrifugal fan in said first compartment fastened to said shaft, said fan having a transverse wall adjacent said first wall, said transverse wall having a plurality of small holes extending therethrough as an outlet from said first compartment, said first wall having a central aperture disposed opposite the plurality of holes in said fan, a second centrifugal fan in said second compartment fastened to said shaft, a second reentrant scoop at the periphery of said second compartment to direct the fluid stream from the second compartment to the recirculating passageway means, said second scoop extending through said first compartment positioned down-stream of said first scoop, a spiral wall in said second compartment extending from the inboard side of said second scoop to a point near but spaced from the peripheral wall of said body, a plurality of small scoops in said spiral wall opening into the fluid stream inboard of said spiral wall, a Venturi structure in said second compartment in the fluid stream, an exit scoop in said second compartment inboard of said spiral wall, a channel in said third compartment having first and second ends, said first end being in communication with said exit scoop through said second wall, a reentrant conduit extending through said second wall having the entrance end thereof disposed near the second end of said channel and having the exit end thereof disposed near the throat of said venturi, and an exit housing inside said third compartment in communication with said body outlet.

13. A vaporizer for use with an internal combustion engine utilizing a mixture of vaporized liquid fuel and air, said vaporizer comprising a hollow cylindrical body, a revoluble shaft axially journalled in said body and adapted to be externally driven, an inlet for the gaseous mixture disposed on the axis of and at a first end of said body, an outlet from said body for the vaporized gaseous mixture at the opposite end of said body, first and second transverse walls in said body establishing first, second, and third axially spaced compartments inside said body extending from the first to the second end thereof in that order, an inlet conduit axially disposed and surrounding said shaft and connecting said inlet with said first compartment, a recirculating conduit surrounding said inlet conduit, the space between said recirculating conduit and said inlet conduit communicating with the center of said first compartment, a centrifugal fan in said first compartment fastened to said shaft, a reentrant scoop at the periphery of said first compartment to direct the fiuid stream from said first compartment to the recirculating conduit, said fan having a discshaped wall adjacent said first wall, said discshaped wall having a plurality of small holes extending therethrough as a passageway, said first wall having a central aperture of sufficient size to be disposed opposite the plurality of holes in said fan, a spiral wall in said first compartment extending from the inboard side of said scoop to a point on the peripheral wall of said body, a second centrifugal fan in said second compart-- ment fastened to said shaft, a second reentrant scoop at the periphery of said second compartment to direct the fluid stream from the second compartment to the recirculating conduit, said second'scoop extending through said first compartment positioned down-stream of said first scoop, a second spiral wall in said second cornpartment extending from the inboard side of said second scoop to a point near but spaced from the peripheral wall of said body, a plurality of small scoops in said second spiral wall opening into the fluid stream inboard of said second spiral wall, a Venturi structure in said second compartment in the fluid stream, an exit scoop in said second compartment inboard of said second spiral wall, a channel in said third compartment having first and second ends, said first end being in communication with said exit scoop through said second wall, said second end being disposed close to said cylindrical body to exhaust said mixture into said third compartment, a reentrant tube extending through said second wall having the entrance end thereof disposed near the second end of said channel and having the exit end thereof disposed near the throat of said venturi, an exit housing inside said third compartment in communication with said body outlet, and a check valve carried by said exit housing permitting only unidirectional flow of the vaporized mixture out of said body outlet.

14. A vaporizer for use with an internal combustion engine utilizing a mixture of vaporized liquid fuel and air, said vaporizer comprising a hollow cylindrical body, a revoluble shaft axially journalled in said body and adapted to be externally driven, an inlet for the gaseous mixture disposed on the axis of and at a first end of said body, an outlet from said body for the vaporized gaseous mixture at the opposite end of said body, first, second, and third transverse walls in said body establishing first, second, third, and fourth axially spaced compartments inside said body extending from the first to the second end thereof in that order, an inlet conduit axially disposed and surrounding said shaft and connecting said inlet with said second compartment by extending through said first compartment, a recirculating conduit in said first compartment surrounding said inlet conduit, the space between said recirculating conduit and said inlet conduit communi eating with the center of said second compartment, a centrifugal fan in said second compartment fastened to said shaft, a reentrant scoop at the periphery of said second compartment to direct the gas stream from said second compartment to the recirculating conduit, said fan having a disc-shaped wall adjacent said second wall, said disc-shaped wall having a plurality of small holes extending therethrough as a passageway, said second wall having a central aperture of suificient size to be disposed opposite the plurality of holes in said fan, a spiral wall in said second compartment extending from the inboard side of said scoop to a point on the peripheral wall of said body approximately diametrically opposite said scoop, a second centrifugal fan in said third com partment fastened to said shaft, a second reentrant scoop at the periphery of said third compartment to direct the gas stream from the third compartment to the recirculating conduit, said second scoop extending through said second compartment positioned down-stream of said first scoop, a second spiral wall in said third compartment extending from the inboard side of said second scoop to a point near but spaced from the peripheral wall of said body approximately diametrically opposite said second scoop, a plurality of small scoops in said second spiral wall opening into the gas stream inside said second spiral wall, a Venturi structure in said third compartment in the fluid stream disposed generally opposite said second spiral wall, an exit scoop in said third compartment inboard of said second spiral wall, said third wall having an aperture communicating with said exit scoop, a curved conduit circumscribing about in said fourth compartment having first and second ends, said first end being in communication with said exit scoop through said third. wall aperture, said second end being disposed close to said cylindrical body to exhaust said mixture into said fourth compartment, a reentrant tube extending through said third wall having the entrance end thereof disposed near the second end of said curved conduit and having the exit end thereof disposed near the throat of said venturi, an exit housing inside said fourth compartment in communication with said body outlet, and a check valve carried by said exit housing permitting only unidirectional flow of the vaporized mixture out of said body outlet.

15. A vaporizer for use with an internal combustion engine utilizing a mixture of vaporized liquid fuel and air, said vaporizer comprising a hollow cylindrical body, a revoluble shaft axially journalled in said body and adapted to be externally driven, an inlet for the gaseous mixture disposed on the axis of and at a first end of said body, an outlet from said body for the vaporized. gaseous mixture at the opposite end of said body, first, second, and third transverse walls in said body establishing first, second, third, and fourth axially spaced compartments inside said body extending from the first to the second end thereof in that order, an inlet conduit axially disposed and surrounding said shaft and connecting said inlet with said second compartment by extending through said first compartment, a perforated conduit axially surrounding said inlet conduit in said first compartment, a wall closing the first end of said perforated conduit, said first wall having a circular aperture and joining with said perforated conduit at said aperture to provide fluid communication between said second compartment and the space between said inlet conduit and said perforated conduit, a keyhole conduit in said first compartment axially surrounding said perforated conduit for a major fraction of the circumference thereof and having walls extending to the cylindrical shell of said body to form the keyhole portion of the conduit, the space between said keyhole conduit and said perforated conduit communicating with the center of said second compartment through the holes in said perforated conduit, a centrifugal fan in said second compartment fastened to said shaft for creating a higher fluid pressure at the periphery of said compartment than at the axis thereof, a reentrant scoop for the heavier mixture at the periphery of said second compartment to direct the gas stream from said second compartment to the space inside said keyhole portion, said fan having a disc-shaped wall adjacent said second wall, said disc-shaped wall having a plurality of small holes extending therethrough as a passageway for the lighter mixture, said second wall havin a central aperture of sufficient size to be disposed opposite the plurality of holes in said fan, a spiral wall in said second compartment extending from the inboard side of said scoop to a point on the peripheral Wall of said body approximately diametrically opposite said scoop, a second centrifugal fan in said third compartment fastened to said shaft, a second reentrant scoop for the heavier mixture at the periphery of said third compartment to direct the gas stream from the third compartment to the space inside said keyhole portion, said second scoop extending through said second compartment positioned down-stream of said first scoop, a second spiral wall in said third compartment extendin from the inboard side of said second scoop to a point near but spaced from the peripheral Wall of said body approximately diametrically opposite said second scoop, a plurality of small scoops in said second spiral wall opening into the gas stream inside said second spiral wall to direct some of the heavier mixture to the channel defined by the second spira1 wall and the cylindrical body, a Venturi structure in said third compartment in the fluid stream disposed generally opposite said second spiral wall, an exit scoop for the lighter mixture in said third compartment inboard of said second spiral wall and generally opposite said second scoop, said third wall havin an aperture communicating with said exit scoop, a curved conduit circumscribing about in said fourth compartment and having first and second ends, said first end being in communication with said exit scoop through said third wall aperture, said second end being disposed close to said cylindrical body to exhaust said mixture into said fourth compartment, a reentrant tube for the heavier mixture extending through said third wall and having the entrance end thereof disposed near the second end of said curved conduit and having the exit end thereof disposed near the throat of said venturi, an exit housing inside said fourth compartment in communication with said body outlet, and a check valve carried by said exit housin permitting only unidirectional flow of the vaporized mixture out of said body outlet.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,174,529 Sykes Mar. 7, 1916 1,592,713 Bendixen July 13, 1926 1,625,997 Gorkwist Apr. 26, 1927 1,911,644 Overbury May 30, 1933 

15. A VAPORIZER FOR USE WITH AN INTERNAL COMBUSTION ENGINE UTILIZING A MIXTURE OF VAPORIZED LIQUID FUEL AND AIR, SAID VAPORIZER COMPRISING A HOLLOW CYLINDRICAL BODY, A REVOLUBLE SHAFT AXIALLY JOURNALLED IN SAID BODY AND ADAPTED TO BE EXTERNALLY DRIVEN, AN INLET FOR THE GASEOUS MIXTURE DISPOSED ON THE AXIS OF AND AT A FIRST END OF SAID BODY, AN OUTLET FROM SAID BODY FOR THE VAPORIZED GASEOUS MIXTURE AT THE OPPOSITE END OF SAID BODY FIRST, SECOND, AND THIRD TRANSVERSE WALLS IN SAID BODY ESTABLISHING FIRST, SECOND THIRD AND FOURTH AXIALLY SPACED COMPARTMENTS INSIDE SAID BODY EXTENDING FROM THE FIRST TO THE SECOND END THEREOF IN THAT ORDER, AN INLET CONDUIT AXIALLY DISPOSED AND SURROUNDING SAID SHAFT AND CONNECTING SAID INLET WITH SAID SECOND COMPARTMENT BY EXTENDING THROUGH SAID FIRST COMPARTMENT, A PERFORATED CONDUIT AXIALLY SURROUNDING SAID INLET CONDUIT IN SAID FIRST COMPARTMENT, A WALL CLOSING THE FIRST END OF SAID PERFORATED CONDUIT, SAID FIRST WALL HAVING A CIRCULAR APERTURE AND JOINING WITH SAID PERFORATED CONDUIT AT SAID APERTURE TO PROVIDE FLUID COMMUNICATION BETWEEN SAID SECOND COMPARTMENT AND THE SPACE BETWEEN SAID INLET CONDUIT AND SAID PERFORATED CONDUIT, A KEYHOLE CONDUIT IN SAID FIRST COMPARTMENT AXIALLY SURROUNDING SAID PERFORATED CONDUIT FOR A MAJOR FRACTION OF THE CIRCUMFERENCE THEREOF AND HAVING WALLS EXTENDING TO THE CYLINDRICAL SHELL OF SAID BODY TO FORM THE KEYHOLE PORTION OF THE CONDUIT, THE SPACE BETWEEN SAID KEYHOLE CONDUIT AND SAID PERFORATED CONDUIT COMMUNICATING WITH THE CENTER OF SAID SECOND COMPARTMENT THROUGH THE HOLES IN SAID PERFORATED CONDUIT, A CENTRIFUGAL FAN IN SAID SECOND COMPARTMENT FASTENED TO SAID SHAFT FOR CREATING A HIGHER FLUID PRESSURE AT THE PERIPHERY OF SAID COMPARTMENT THAN AT THE AXIS THEREOF, A REENTRANT SCOOP FOR THE HEAVIER MIXTURE AT THE PERIPHERY OF SAID SECOND COMPARTMENT TO DIRECT THE GAS STREAM FROM SAID SECOND COMPARTMENT TO THE SPACE INSIDE SAID KEYHOLE PORTION, SAID FAN HAVING A DISC-SHAPED WALL ADJACENT SAID SECOND WALL, SAID DISC-SHAPED WALL HAVING A PLURALITY OF SMALL HOLES EXTENDING THERETHROUGH AS A PASSAGEWAY FOR THE LIGHTER MIXTURE, SAID SECOND WALL HAVING A CENTRAL APERTURE OF SUFFICIENT SIZE TO BE DISPOSED OPPOSITE THE PLURALITY OF HOLES IN SAID FAN, A SPIRAL WALL IN SAID SECOND COMPARTMENT EXTENDING FROM THE INBOARD SIDE OF SAID SCOOP TO A POINT ON THE PERIPHERAL WALL OF SAID BODY APPROXIMATELY DISMETRICALLY OPPOSITE SAID SCOOP, A SECOND CENTRIFUGAL FAN IN SAID THIRD COMPARTMENT FASTENED TO SAID SHAFT, A SECOND REENTRANT SCOOP FOR THE HEAVIER MIXTURE AT THE PERIPHERY OF SAID THIRD COMPARTMENT TO DIRECT THE GAS STREAM FROM THE THIRD COMPARTMENT TO THE SPACE INSIDE SAID KEYHOLE PORTION, SAID SECOND SCOOP EXTENDING THROUGH SAID SECOND COMPARTMENT POSITIONED DOWN-STREAM OF SAID FIRST SCOOP, A SECOND SPIRAL WALL IN SAID THIRD COMRALITY OF SMALL SCOOPS IN SAID SECOND SCOOP, A PLUOPENING INTO THE GAS STREAM INSIDE SAID SECOND THE PERIPHERAL WALL OF SAID BODY APPROXIMATELY DIAMETRICALLY OPPOSITE SAID SECOND SCOOP, A PLURALITY OF SMALL SCOOPS IN SAID SECOND SPIRAL WALL OPENING INTO THE GAS STREAM INSIDE SAID SECOND SPIRAL WALL TO DIRECT SOME OF THE HEAVIER MIXTURE TO THE CHANNEL DEFINED BY THE SECOND SPIRAL WALL, AND THE CYLINDRICAL BODY, A VENTURI STRUCTURE IN SAID THIRD COMPARTMENT IN THE FLUID STREAM DISPOSED GENERALLY OPPOSITE SAID SECOND SPIRAL WALL, AN EXIT SCOOP FOR THE LIGHTER MIXTURE IN SAID THIRD COMPARTMENT INBOARD OF SAID SECOND SPIRAL WALL AND GENERALLY OPPOSITE SAID SECOND SCOOP, SAID THIRD WALL HAVING AN APERTURE COMMUNICATING WITH SAID EXIT SCOOP, A CURVED CONDUIT CIRCUMSCRIBING ABOUT 180* IN SAID FOURTH COMPARTMENT AND HAVING FIRST AND SECOND ENDS, SAID FIRST END BEING IN COMMUNICATION WITH SAID EXIT SCOOP THROUGH SAID THIRD WALL APERTURE, SAID SECOND END BEING DISPOSED CLOSE TO SAID CYLINDRICAL BODY TO EXHAUST SAID MIXTURE INTO SAID FOURTH COMPARTMENT, A REENTRANT TUBE FOR THE HEAVIER MIXTURE EXTENDING THROUGH SAID THIRD WALL AND HAVING THE ENTRANCE END THEREOF DISPOSED NEAT THE SECOND END OF SAID CURVED CONDUIT AND HAVING THE EXIT END THEREOF DISPOSED NEAT THE THROAT OF SAID VENTURI, AN EXIT HOUSING INSIDE SAID FOURTH COMPARTMENT IN COMMUNICATION WITH SAID BODY OUTLET, AND A CHECK VALVE CARRIED BY SAID EXIT HOUSING PERMITTING ONLY UNIDIRECTIONAL FLOW OF THE VAPORIZED MIXTURE OUT OF SAID BODY OUTLET. 